Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China.
Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China; Key Laboratory of Industrial Waste Resource Utilization, Henan University of Science and Technology, Luoyang 471023, China.
Bioresour Technol. 2019 Jun;282:148-155. doi: 10.1016/j.biortech.2019.03.012. Epub 2019 Mar 5.
In this study, a novel surface modified and partly reduced graphene oxide (PRGO) induced by mild oligomeric proanthocyanidins (OPC) was prepared for efficient dye removal. The in situ partial reduction, modification and assembly of GO sheets into OPC-PRGO aerogels were readily realized by a hydrothermal process. Systemically characterizations were performed to confirm the partial reduction and modification of GO by OPC. The OPC-PRGO aerogels exhibited a honeycomb-like structure rather than a snowflake-like structure of GO aerogel. Due to its unique structure, the OPC-PRGO aerogels exhibited an excellent adsorption property towards organic dyes, such as methylene blue (MB), neutral red (NR), amino black (AB) and Congo red (CR). The removal efficiencies of OPC-PRGO towards MB, NR, AB and CR were observed to be 97.5, 94.5, 87.2 and 88.2%, respectively. This study opens a new insight for understanding and preparing partly reduced GO instead of completely reduced GO for hydrophilic polymer/graphene composites.
在这项研究中，通过温和的低聚原花青素（OPC），制备了一种新型的表面改性和部分还原氧化石墨烯（PRGO），用于有效去除染料。通过水热法，很容易实现 GO 片的原位部分还原、改性和组装成 OPC-PRGO 气凝胶。系统的特性分析证实了 OPC 对 GO 的部分还原和改性。OPC-PRGO 气凝胶呈现出蜂窝状结构，而不是 GO 气凝胶的雪花状结构。由于其独特的结构，OPC-PRGO 气凝胶对有机染料，如亚甲蓝（MB）、中性红（NR）、氨基黑（AB）和刚果红（CR）表现出优异的吸附性能。OPC-PRGO 对 MB、NR、AB 和 CR 的去除效率分别为 97.5%、94.5%、87.2%和 88.2%。这项研究为理解和制备部分还原氧化石墨烯（PRGO）而非完全还原氧化石墨烯（GRGO）以用于亲水聚合物/氧化石墨烯复合材料提供了新的见解。
